You will be given a definition of a task first, then some input of the task.
Generate the answer for a given question. The question requires common knowledge of English. Make sure that the answer is in detail, long, consistent with the context, and requires general knowledge of English. To be less repetitive, please vary your language for each question. Give a proper explanation to answer, and if necessary, provide the definition of various terms. And conclude your answer if it's long. If you have used other resources (e.g., Merriam Webster's.) to answer the question, include citations in your answer. You don't need to paraphrase the context of your resources, but make sure that your answer is consistent and complete.

For example, let's say I'm copying instructions by hand. The original instructions say: Multiply the first by the second Integrate the third with the fourth Integrate the third with the fifth And on a page I write: Multiply the first by the second Integrate the third with the fourth '' with the fifth I know this example is silly, but hopefully it's clear what I mean. What is this called?.
Output:
They are ditto marks. ditto stems from the Tuscan dialect of the Italian detto - 'said'; Latin dictus - 'said'. Oxford Dictionaries Online.